With those birthdates you should find the births in the Irish Civil records. The birth record will give exact townland. The FHL has the indices and the actual records on microfilm. There was an excellent article in the "Irish At Home and Abroad" on the civil records. Any good genealogical library should carry this periodical.
Irish Civil records started for ALL Ireland residents in 1864.
All the best.
Kathy Flynn, CGRS